Combination mixing tank and a panel unit



FIG. 1 is a front, top and right side perspective view of a combination mixing tank and panel unit showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a top plan view; and

FIG. 4 is a right side elevation view, the left side elevational view being a mirror image thereof. 

The ornamental design for a combination mixing tank and panel unit, as shown and described. 